Printing-frame.



No. 855,375. I PATENTED MAY 28, 1907 W. B. YOUNG.

PRINTING FRAME.

APPLICATION FILED MAB.31, 1906. EENEWED APR. 16, 1907.

Fig.1

Fig. 2

Witnesses. Inventor UNITED STATESWPATENT OFFICE.

PRINTING-FRAME.

Specification of Letters Patent.

Patented May 28, 1907.

Application filed March 31,1906. Renewed April 15,1907. Serial No.368,378-

TO all whom it may concern:

Be it known that I, WILLIAM BRUCE YOUNG, of the city of Brandon, in theProvince of Manitoba, Canada, photographer, have invented certain newand useful Improvements in Printing-Frames, of which the following isthe specification.

My invention relates to improvements in printing frames, and the objectof the invention is to provide means which will overcome the diflicultyheretofore experienced in the judging of the time of exposure of aprint, and it consists essentially of a frame having the usual springpressed removable portion, and provided with a sheet of glass or othertransparent material all arranged and constructed as hereinafter moreespecially described.

Figure 1 is a rear perspective view of my complete printing frame. Fig.2 is a vertical longitudinal sectional view, the section being takenthrough the center of the frame. Fig. 3 is a vertical sectional viewthrough my complete frame, the section being in the plane as indicatedby line X X Fig. 2.

In the drawings like letters of reference indicate corresponding partsin each figure.

A is the ordinary form of rectangular printing frame, having the lippedopposing plates B extending inwardly from the rear face thereof, and theflange C extending inwardly around the front face.

D, is a portion of the back and is of the or dinary form. Securedthereto by means of hinges E is a portion D having an opening F and atransparent substance F such as glass or the like secured therein. Theglass F is to lie flush with the front face of the two side portions G Gand is dovetailed into said portions, thus securing it therein. The twoportions D D are removably secured in the frame A, by the springs H,coacting with the lips B as in the ordinary form of printing frame.

My printing frame is more especially adapted to sun printing and when itis desired to make an exposure, the negative I is placed in the frame Abearing on the flange C and the sensitized paper and the back are placedand secured as in the ordinary manner.

The advantage gained by the transparent opening, is simply this:Heretofore when it was required to judge the print it was necessary toundo and turn back either one of the portions D or D thereby being ableto look directly at the print itself. This necessitated considerableloss of time as well as the constant danger of moving the sensitizedpaper. In my invention such is overcome, the length of the exposurebeing timed by simply looking through the transparent back and judgingthe exposure by the depth of the print. With a little experience suchcan be judged very accurately.

It is to be understood that although I show one method of securing thetransparent material in the back of the removable portion of the frame,Within the scope of the appended claims, other such suitable means maybe employed without departing from the spirit of my invention.

What I claim as my invention is:

1. A printing frame comprising a frame provided with flanges to receivethe nega tive, and a removable back for holding the sensitive paperagainst the negative, said back having an opening with a transparentmaterial therein, as and for the purpose specified.

2. In a device of the class described, the combination with thereceiving frame, and the spring pressed removable back, of a transparentmaterial within the back, as and for the purpose specified.

3. In a printing frame, the combination with the receiving frame of aspring pressed removable back, said back being composed of two portionshinged together, one portion of which has an opening extendingtherethrough and a transparent material secured to and flush with theinner face thereof, as and for the purpose specified.

4. In a printing frame, the combination with the receiving frame of aremovably se cured back, said back being composed of two portions hingedtogether, one portion of which has an opening extending therethrough andgrooves cut in the outstanding sides, so placed and designed to secureand hold the glass flush with the inner face of the back, as and for thepurpose specified.

WILLIAM BRUCE YOUNG.

WVitnesses:

JENNIE GRANT, S. E. CLEMENT.

